Sucky time to be starting a new mining rig!  markets are way down and pool hi-jacking occuring on several multipools.   6 R9-270x and only 2+ MHs? not good.  Dunno what to say there are wiser miners here than I.

See https://litecoin.info/Mining_hardware_comparison for some guides for your cgminer settings that others are using.  Just a starting point, I am still learning about tweaking my cgminer.conf ...

I would advise to get cgminer-kalroth which was just patched today to deter hi-jacking.
http://k-dev.net/cgminer/

Be sure to include the new option

"no-client-reconnect" : true,

in your cgminer.conf if you decide to go with patched miner.  Also I have noticed cgminer-kalroth boosted my hashrate by about 20KHs per card which is awesome.